Pain on the inside of the left arm depends on the location. If close to the elbow joint may be the humerus medial epicondylitis, different from the humerus epicondylitis, humerus lateral epicondylitis common name called tennis elbow, while the humerus medial epicondylitis common name called golf elbow, is due to long-term activities, labor, the humerus medial epicondylar ligament stopping point caused by the repeated pulling of the sterile inflammation, you can go to the hospital to find a doctor to confirm the diagnosis. If it is humeral epicondylitis, often need local closed treatment, local closed treatment is fast and effective. If the patient is afraid of injections and does not want to do injection therapy, you can apply herbal medicine, reduce activities, and wait for the inflammation to subside.